diff --git a/sidebars.js b/sidebars.js
index 06689adc351..4fc23b6ba78 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -72,6 +72,7 @@ module.exports = {
         {
           type: 'category',
           label: 'Build Your First App',
+          key: 'angular-your-first-app',
           items: [
             'angular/your-first-app',
             'angular/your-first-app/taking-photos',
@@ -114,6 +115,7 @@ module.exports = {
         {
           type: 'category',
           label: 'Build Your First App',
+          key: 'react-your-first-app',
           items: [
             'react/your-first-app',
             'react/your-first-app/taking-photos',
@@ -164,6 +166,7 @@ module.exports = {
         {
           type: 'category',
           label: 'Build Your First App',
+          key: 'vue-your-first-app',
           items: [
             'vue/your-first-app',
             'vue/your-first-app/taking-photos',
diff --git a/versioned_sidebars/version-v7-sidebars.json b/versioned_sidebars/version-v7-sidebars.json
index 0e3dc75dd63..e0627cbdb3e 100644
--- a/versioned_sidebars/version-v7-sidebars.json
+++ b/versioned_sidebars/version-v7-sidebars.json
@@ -83,6 +83,7 @@
         {
           "type": "category",
           "label": "Build Your First App",
+          "key": "angular-your-first-app",
           "items": [
             "angular/your-first-app",
             "angular/your-first-app/taking-photos",
@@ -116,6 +117,7 @@
         {
           "type": "category",
           "label": "Build Your First App",
+          "key": "react-your-first-app",
           "items": [
             "react/your-first-app",
             "react/your-first-app/taking-photos",
@@ -166,6 +168,7 @@
         {
           "type": "category",
           "label": "Build Your First App",
+          "key": "vue-your-first-app",
           "items": [
             "vue/your-first-app",
             "vue/your-first-app/taking-photos",